Golang - разбить ip диапазон на 4 части

go_chunk_ip_mask.go

// http://play.golang.org/p/JlYJXZnUxl
package main

import (
	"fmt"
	"net"
)

func inet_aton(ip string) (ip_int uint32) {
	ip_byte := net.ParseIP(ip).To4()
	for i := 0; i < len(ip_byte); i++ {
		ip_int |= uint32(ip_byte[i])
		if i < 3 {
			ip_int <<= 8
		}
	}
	return
}

func inet_ntoa(ip uint32) string {
	return fmt.Sprintf("%d.%d.%d.%d", byte(ip>>24), byte(ip>>16), byte(ip>>8),
		byte(ip))
}


func main() {
	ip0 := inet_aton("127.0.0.1")
	ip1 := inet_aton("127.0.225.224")
	
	diff := ip1 - ip0
	var parts uint32 = 4
	step := diff/parts 
	
	ipRange := make([]string, parts)
	for i := uint32(0); i < parts; i++ {
		ipRange[i] = inet_ntoa(ip0 + step*i)
	}
	
	fmt.Println(ipRange, "127.0.225.224")
}